After the security upgrade, MIFARE Plus uses AES-128 (Advanced Encryption Standard) for authentication, data integrity and encryption. MIFARE Plus is based on open global standards for both air interface and cryptographic methods at the highest security level.

MIFARE Plus is available in two versions: MIFARE Plus X and MIFARE Plus S.

The MIFARE Plus X (MF1PLUSx0y1, described in this data sheet) offers more flexibility to optimize the command flow for speed and confidentiality. It offers a rich feature set including proximity checks against relay attacks.

The MIFARE Plus S (MF1SPLUSx0y1)is the standard version for straight forward migration of MIFARE Classic systems. It is configured to offer high data integrity.